管道系统压力试验应按设计要求进行

管道系统压力试验应按设计要求进行
2021年01月05日08:24:11 0 284

管道系统的试压应按设计要求进行

管道系统试验及吹扫

7.1管道试压

1) 管道安装完毕,无损检测合格后,按设计要求进行管道系统试压。

2) 管道试压前,施工单位应对相应数据进行复核确认,并共同核对相应的技术和质量条件。试压合格后方可进行。

3) 水压试验在设计压力的1.5倍下进行。

4) 试压应按管道设计压力分段进行,同一设计压力的管道可同时连接试压。

5) 试验程序和要求

(1) 尽可能将设计压力相同的管道连接成一个或多个系统。

(2) 将设备、安全阀、仪表等连接的接管用盲板封闭,并做明显标记。

(3) 试压站、水源、试压管道用32×3mm管道连接。

(4) 试压站出口管和试压管线高点各安装两个压力表。压力表应经过校验,周检期间精度不低于1.5级,满刻度值应为被测最大压力的1.5-2倍。

(5) 试压管线高点设放空阀,低点设放空阀。

(6) 打开高点排气阀,向系统注水。待水满后,确认系统内气体已排尽,关闭放空阀。

(7) 管道水压试验时,缓慢升压至试验压力,稳压10min,压降不大于0.05Mpa,无异常现象。当压力降至工作压力并进行外观检查时,无渗漏、无变形为合格。

(8) 试压合格前24小时通知监理部门确认试压管线。

(9) 管道试压合格后,应缓慢降压。如果试验介质重复使用,应在出口处添加过滤装置。排放时应防止系统中出现负压。

(10) 试压后,打开高点放空阀和低点放空阀,拆除临时盲板,用压力风车吹扫系统内的水。

注:试验中如有泄漏,不允许带压修理。缺陷消除后应重新进行试验。


The pressure test of pipeline system shall be carried out according to the design requirements

Pipeline system test and purging

7.1 pipeline pressure test

1) The pressure test of pipeline system shall be carried out according to the design requirements after the pipeline is installed and the nondestructive testing is qualified.

2) Before the pipeline pressure test, the construction unit shall review and confirm the corresponding data, and jointly check the corresponding technical and quality conditions. The pressure test can be carried out only after it is qualified.

3) The water pressure test was carried out at 1.5 times the design pressure.

4) The pressure test shall be carried out in sections according to the design pressure of the pipeline, and the pipelines with the same design pressure can be connected for pressure test at the same time.

5) Test procedures and requirements

(1) connect the pipelines with the same design pressure as far as possible to form a whole system or several systems.

(2) blind the connected nozzles of equipment, safety valves, instruments, etc. with blind plates, and make obvious marks.

(3) connect pressure test station, water source and pressure test pipeline with 32 × 3mm pipe.

(4) two pressure gauges shall be installed at the outlet pipe of the pressure test station and the high point of the pressure test line respectively. The pressure gauge shall have been calibrated, and its accuracy shall not be lower than grade 1.5 during the weekly inspection period, and the full scale value shall be 1.5-2 times of the maximum pressure to be measured.

(5) vent valve is set at high point of pressure test line and vent point is set at low point.

(6) open the high point vent valve and fill the system with water. After the water is full, confirm that the gas in the system has been completely drained and close the vent valve.

(7) during the hydraulic test of the pipeline, slowly increase the pressure to reach the test pressure, stabilize the pressure for 10min, the pressure drop is not greater than 0.05Mpa, and there is no abnormal phenomenon. When the pressure is reduced to the working pressure and the appearance inspection is carried out, it is qualified if there is no leakage and deformation.

(8) inform the supervision department 24 hours before passing the pressure test to confirm the pressure test pipeline.

(9) after the pipeline passes the pressure test, the pressure shall be reduced slowly. If the test medium is reused, a filtering device should be added at the outlet. The negative pressure in the system should be prevented when discharging.

(10) after the pressure test, open the high point vent valve and low point vent valve, remove the temporary blind plate, and use the pressure windmill to purge the water in the system.

Note: in case of leakage during the test, it is not allowed to repair under pressure. The test shall be repeated after the defect is eliminated.


管道系统压力试验应按设计要求进行

 

管道系统试验及吹扫

7.1管道压力试验

1)管道系统压力试验应按设计要求,在管道安装完毕、无损检测合格后进行。

2)管道试压前,应由施工单位对相应资料进行审查确认,并联合检查相应的技术及质量条件,合格后方可进行试压。

3)压力试验采用洁净水进行,水压试验压力取设计压力的1.5倍。

4)压力试验应按管线设计压力进行分段试验,设计压力相同的管线可连通起来同时进行压力试验。

5)试验步骤及要求

⑴将设计压力相同的管线尽可能连通起来,连成一个整体系统或几个系统。

⑵用盲板,将设备或安全阀、仪表等连通的管嘴盲死,做明显标记。

⑶用φ32×3mm管子,连接试压站、水源、和试压管线。

⑷分别在试压站出口管和试压线高点安装两块压力表,压力表应是已经校验,并在周检期内,其精度不得低于1.5级,满刻度值应为被测最大压力的1.5~2倍。

⑸.试压线高点设置排空阀,低点设置放空点。

⑹打开高点排空阀后向系统内充水,水注满后应确认系统内的气体已经全部排净,关闭排空阀。

⑺管道进行水压试验时,缓慢升压达到试验压力后,稳压10min,压力降不大于0.05Mpa,且未发生异常现象,在将压力降至工作压力,进行外观检验,无渗漏和无变形为合格。

⑻.试压合格前24小时内通知监理部门,对试压管线进行确认。

⑼.管道试压合格后,应缓慢降压。试验介质若重复利用,需在排水口处增设过滤装置。排液时应防止系统内形成负压。

⑽试压结束后,打开高点排空阀和低点放空阀后,拆除所用的临时盲板,用压风车将系统内的水吹扫干净。

注:试验过程中若有泄漏,不得带压修理。缺陷消除后应重新试验。

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